package com.yuju.util;

import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;

public class AESUtil {

    /**
     * 加密
     * 
     * @param content 需要加密的内容
     * @param password  加密密码
     * @return
     */
    public static byte[] encrypt(String content, String password) {
            try {           
                    KeyGenerator kgen = KeyGenerator.getInstance("AES");
                    kgen.init(128, new SecureRandom(password.getBytes()));
                    SecretKey secretKey = kgen.generateKey();
                    byte[] enCodeFormat = secretKey.getEncoded();
                    SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
                    Cipher cipher = Cipher.getInstance("AES");// 创建密码器
                    byte[] byteContent = content.getBytes("utf-8");
                    cipher.init(Cipher.ENCRYPT_MODE, key);// 初始化
                    byte[] result = cipher.doFinal(byteContent);
                    return result; // 加密
            } catch (NoSuchAlgorithmException e) {
                    e.printStackTrace();
            } catch (NoSuchPaddingException e) {
                    e.printStackTrace();
            } catch (InvalidKeyException e) {
                    e.printStackTrace();
            } catch (UnsupportedEncodingException e) {
                    e.printStackTrace();
            } catch (IllegalBlockSizeException e) {
                    e.printStackTrace();
            } catch (BadPaddingException e) {
                    e.printStackTrace();
            }
            return null;
    }
    
    
    
    
    
    /**解密
     * @param content  待解密内容
     * @param password 解密密钥
     * @return
     */
    public static byte[] decrypt(byte[] content, String password) {
            try {
                     KeyGenerator kgen = KeyGenerator.getInstance("AES");
                     kgen.init(128, new SecureRandom(password.getBytes()));
                     SecretKey secretKey = kgen.generateKey();
                     byte[] enCodeFormat = secretKey.getEncoded();
                     SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");            
                     Cipher cipher = Cipher.getInstance("AES");// 创建密码器
                    cipher.init(Cipher.DECRYPT_MODE, key);// 初始化
                    byte[] result = cipher.doFinal(content);
                    return result; // 加密
            } catch (NoSuchAlgorithmException e) {
                    e.printStackTrace();
            } catch (NoSuchPaddingException e) {
                    e.printStackTrace();
            } catch (InvalidKeyException e) {
                    e.printStackTrace();
            } catch (IllegalBlockSizeException e) {
                    e.printStackTrace();
            } catch (BadPaddingException e) {
                    e.printStackTrace();
            }
            return null;
    }
    
    
    /**将二进制转换成16进制
     * @param buf
     * @return
     */
    public static String parseByte2HexStr(byte buf[]) {
            StringBuffer sb = new StringBuffer();
            for (int i = 0; i < buf.length; i++) {
                    String hex = Integer.toHexString(buf[i] & 0xFF);
                    if (hex.length() == 1) {
                            hex = '0' + hex;
                    }
                    sb.append(hex.toUpperCase());
            }
            return sb.toString();
    }
    
    
    
    
    /**将16进制转换为二进制
     * @param hexStr
     * @return
     */
    public static byte[] parseHexStr2Byte(String hexStr) {
            if (hexStr.length() < 1)
                    return null;
            byte[] result = new byte[hexStr.length()/2];
            for (int i = 0;i< hexStr.length()/2; i++) {
                    int high = Integer.parseInt(hexStr.substring(i*2, i*2+1), 16);
                    int low = Integer.parseInt(hexStr.substring(i*2+1, i*2+2), 16);
                    result[i] = (byte) (high * 16 + low);
            }
            return result;
    }
    
    /**
     * 加密
     * @param str
     * @param key
     */
    public static String AES_encrypt(String str, String key) {
        byte[] encryptResult = encrypt(str, key);
        String encryptResultStr = parseByte2HexStr(encryptResult);
        return encryptResultStr;
    }
    
    /**
     * 解密
     * @param str
     * @param key
     */
    public static String AES_decrypt(String encryptStr, String key) {
    	byte[] decryptFrom = parseHexStr2Byte(encryptStr);
        byte[] decryptResult = decrypt(decryptFrom,key);
        return new String(decryptResult);
    }
    
    public static void main1(String[] args) {
        String name = "E30016,U1481430786,TU,M1382437";
        String key = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDIgHnOn7LLILlKETd6BFRJ0GqgS2Y3mn1wMQmyh9zEyWlz5p1zrahRahbXAfCfSqshSNfqOmAQzSHRVjCqjsAw1jyqrXaPdKBmr90DIpIxmIyKXv4GGAkPyJ/6FTFY99uhpiq0qadD/uSzQsefWo0aTvP/65zi3eof7TcZ32oWpwIDAQAB";
        //加密
        /*System.out.println("加密前：" + name);
        byte[] encryptResult = encrypt(name, password);
        String encryptResultStr = parseByte2HexStr(encryptResult);
        System.out.println("加密后：" + encryptResultStr);
        //解密
        byte[] decryptFrom = parseHexStr2Byte(encryptResultStr);
        byte[] decryptResult = decrypt(decryptFrom,password);
        System.out.println("解密后：" + new String(decryptResult));*/
    	String mw = AES_encrypt(name, key);
    	System.out.println(mw);
    	mw = AES_decrypt(mw, key);
    	System.out.println(mw);
	}
    
    public static void main(String[] args) {
    	Map<String, Object> params = new HashMap<String, Object>();
    	params.put("enterprisecode", "E30016,");
    	params.put("usercode", "U1481430786,");
    	params.put("usertype", "TU,");
    	params.put("timestamp", String.valueOf(System.currentTimeMillis() / 1000) + ",");
    	System.out.println(params.toString());
    	Map<String, Object> randomMap = Utils.getSortedMap(params, false, null);
    	Set<Entry<String, Object>> s = randomMap.entrySet();
    	System.out.println("==============================================" + s.size());
    	for (Iterator<Entry<String, Object>> iter = s.iterator(); iter.hasNext();) {
    		Entry<String, Object> iters = iter.next();
    		System.out.println(iters.getKey());
    		System.out.println(iters.getValue());
    		//System.out.println(iter.next().getKey() + "=" + iter.next().getValue());
    	}
    	System.out.println("==============================================");
    	System.out.println(randomMap.toString());
    }
}
